Technical datasheet

EPOCROS™ WS-300

Supplied byNippon Shokubai- Last Updated on Oct 10, 2025

EPOCROS™ WS-300 by Nippon Shokubai is a VOC-free adhesion promoter and crosslinking agent. It is a standard acrylic-based oxazoline functionalized reactive copolymer. The new crosslinking technology enhances the reactivity between oxazoline groups and carboxy groups through a heating and mixing process involving EPOCROS™ WS and a carboxy group-containing emulsion with a specific neutralization rate. It offers lower curing temperature, excellent storage stability, no peeling and long pot life for one packaging.
  • It has higher reactivity than water-based epoxy, melamine and blocked isocyanate.
  • It offers fast-drying, low-toxicity and high crosslinking density with minimal usage.
  • It shows enhanced resistance to water, solvents and heat as well as superior film strength.
  • EPOCROS™ WS-300 is suitable for polyethylene terephthalate (PET), oriented polypropylene (OPP) and polyvinyl chloride (PVC) applications.
  • It is registered with CSCA(Japan) and TSCA(USA) regulations.
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EPOCROS™ WS-300 properties

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PropertiesValue & unitTest conditionTest method
Glass Transition Temperature (Tg)0.0 Visible After LoginVisible After LoginVisible After Login
Molecular Weight, Mn0.0 Visible After LoginVisible After LoginVisible After Login
Molecular Weight, Mw0.0 Visible After LoginVisible After LoginVisible After Login
Non-volatile Content0.0 Visible After LoginVisible After LoginVisible After Login
Oxazoline Content0.0 Visible After LoginVisible After LoginVisible After Login
Weight per Oxazoline (WPO) Equivalent0.0 Visible After LoginVisible After LoginVisible After Login
pH0.0 Visible After LoginVisible After LoginVisible After Login